Multilayer Cylindrical Model

This model simulates the transient flow in any number of independent layers commingled at the wellbore as shown below. Each layer is considered to have a cylindrical geometry with an identical initial pressure (pi) to other layers as well as its own skin factor, reservoir properties, and outer boundary condition. No crossflow between the layers can occur except at the wellbore. The dual porosity flow within each layer can be modeled either as pseudo-steady state or transient interporosity flow.

Note:

This model does not support an observation well.

References

1. "The Application of the Laplace Transformation to Flow Problems in Reservoirs", A.F. van Everdingen and W. Hurst, Trans. AIME (1949) vol. 186, 305 - 324.

2. "A Study of the Behaviour of Bounded Reservoir Composed of Stratified Layers", H.C. Lefkovits, P. Hazebroek, E.E. Allen and C.S. Matthews, SPEJ (March 1961) 43 - 58.

3. "Transient Pressure Behaviour of Commingled Reservoirs", F.J. Kuchuk and D.J. Wilkinson, SPEFE (1991).